What is the chemical name for the compound with the formula Na2S?

a. sodium fluoride

b. magnesium sulfide

c. lithium oxide

d. sodium sulfide

How many milliliters of 0.45 m hcl will neutralize 25.0 ml of 1.00 m koh?

1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first) a. 0.27M b. 0.38M c. 0.32M d. 0.80M 2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.

Which of the following metals is most reactive? A. aluminum B. sodium C. copper D. calcium

Which of the following would release the most heat upon cooling from 75*C to 50*C? Answers:10g H2O (I) 15gAl (s) 25gSn (s) 40gAu (s)

A student has a solid block of steel and a solid plastic block of the same size. Which statement best compares the masses of the two blocks A. The masses cannot be compared without a balance B.

A intramuscular medication is given at 5.00mg/kg of body weight. What is the dose in grams for a 180-lb patient?

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?